Implement the structural probe for syntax structure in Manning and Hewitt 2019

[rteehas]

Implement the initial structural probe (not parse depth) outlined in the Manning and Hewitt paper. This should be written in PyTorch, including any external datasets.

[oserikov]

I will do this

[oserikov]

Guys have their code published in torch, I will be testing it tmrw

[oserikov]

@wadimiusz is now an alpha ver of the wrapper, succesfully reproduced the results w huggingface bert.

[oserikov]

@rteehas does apache 2.0 work for us?:)